PROBLEM TO BE SOLVED: To improve planting precision while preventing the vibration of a planting part by making the eccentricity ratio of a seedling tank moving at a nonuniform speed with an eccentric gear changeable and reducing the eccentricity ratio in sparse planting. SOLUTION: A laterally movable seedling tank holding a mat seedling with soil is moved at the nonuniform speed with eccentric gears 34, 35, 36, 37 to slow down at a seedling taking position with a seedling planting tool and increase the speed at non-seedling taking positions other than the above position, and eccentricity ratio of the eccentric gear is made to be changeable according to the number of planting seedlings per unit area. COPYRIGHT: (C)2008,JPO&INPIT
